Ahh! did btrfs just explode on me?

[Neal Becker]

Chris Murphy wrote:

> On Wed, Jan 21, 2015 at 12:04 PM, Chris Murphy <lists at colorremedies.com>
> wrote:
> 
>> Next you should reboot from Fedora 21 live media, and 'dnf upgrade
>> btrfs-progs' so that you have btrfs-progs 3.18.1, which is stable. And
>> use 'btrfs check --repair' in case there are any missing files, this
>> should find it. After this, you'd update the backup again in case the
>> first one lacks the missing files.
> 
> Of course if this is not root, you can just unmount it to do the btrfs
> check. But if it's root, an alternative to usb booting is to do it
> from the initramfs. But you need to make sure the initramfs contains
> the right version. To do that, boot with parameter rd.break=cmdline
> and then:
> 
> # btrfs --version
> Btrfs v3.18.1
> 
> ## OK Good I can continue, even if this is the 3.17.8 kernel, it's fine.
> 
> # btrfs check --repair <dev>
> # reboot -f
> 
> 
> I did this with a regular initramfs, I didn't try the rescue initramfs
> which almost certainly will have an older version, probably 3.17.
> 

Nice tip.  Unfortunately, btrfs --version says 3.18.  I suppose that is not 
sufficient.

I like this procedure, it sounds simple.  Any way to fix it?  I guess the btrfs 
was from initramfs, and that installing a newer kernel would update initramfs 
and get me btrfs 3.18.1 when booted this way?